Josh and I have spoken about this topic and while he isn't ready to flesh it out just yet I figured I could start a post on it and give my ideas.

First off every player will need a character sheet. (duh) The sheet used will be your personal sheet used to track you real life progress (also duh)

While tabletops give you XP to level in the game for the deeds you do, in Level Grinding we can only level up in the real world. This is what makes this unique in the world of tabletops. You can only do in the game what you can do in real life. What to use guns or be an archer? Better go to the shooting range. What to be good at fighting? learn a martial art etc.

Challenges: while playing with a group of friends (or strangers) and they say they can do something you don't believe you can challenge them to prove it. If you challenge them to prove they can, for example, do a back-flip, before the next game session they will have to prove they can actually do the thing challenged. This shouldn't take place during the game so that all the time isn't spent proving you can actually do things. No one want to waste the time to watch you go run 3 miles while trying to play a game.

Inventory: So far two ideas on inventory have come out and both seem reasonable. The first is to have each player put their actually owned property as their inventory. Got an awesome hand-made Katana and know how to use it? Use it in the game! The other idea is that depending on the game world certain items wouldn't fit and you would have to use items you don't own or don't actually exist. This is okay as well as long as you actually have a skill that is an equivalent. For instance, I know how to shoot firearms, but I don't own a pirate style flint-lock pistol and Glocks don't exist in the game world (they could... just not in this example). I have the skill to shoot pistols and that would count. A simple substitution of a real skill you have to meet the requirements of the game world. Magic could be done in this way as well. Substitute a real skill you have for magic. It would need to be discussed with your GM on what would be acceptable on what skill you would be allowed to substitute on a case by case basis.

The Game World: Much like in D&D the GM would be encouraged to make their own worlds in as much detail as possible to make it and the story you are creating as immersive as possible. If you think others would like that world then please post it on this forum so other can try it out!

I have not got into any of the details about dice or attack rolls or defence rolls yet and need to think on it more. Hopefully Josh or some new members will key in and get this thread going to flesh this out.

A superior man is modest in his speech, but exceeds in his actions.
Confucius